How it works
On a number line you add by jumping forward and take away by jumping back.
Jump the tens first, then the ones. Land on a ten if you can.
Count the spaces between marks, not the marks.
Worked examples
Jump back to take away
- Take away 9 from 19. Start at 19.
- Jump back 9 and land on 10: 19 − 9 = 10.
- The answer is 10.
Find the dot
- A number line counts by fives: 80, 85, 90. The dot is on the mark after 80.
- Count on one jump of five from 80: 80 + 5 = 85.
- The dot is on 85.
The missing jump
- 31 + ? = 45. Start at 31 and aim for 45.
- Jump to 40, which is +9. Then jump to 45, which is +5.
- 9 + 5 = 14, so 31 + 14 = 45 and the missing jump is 14.
A taste of the worksheet
These are the first problems of set A. The printable sheet has many more, with an answer key.
- The dot is on ___ .
- Where is the dot? Write its number: ___
- 60 + 30: Pip jumps three tens. Where does Pip land? ___
- 85 − 36: Pip jumps back 30, then back 6. Where does Pip land? ___
- These jumps start at 48. Which sum do they show?